static void GCLK2_Initialize(void)
{
    GCLK_REGS->GCLK_GENCTRL[2] = GCLK_GENCTRL_DIV(48U) | GCLK_GENCTRL_SRC(6U) | GCLK_GENCTRL_GENEN_Msk;

    while((GCLK_REGS->GCLK_SYNCBUSY & GCLK_SYNCBUSY_GENCTRL_GCLK2) == GCLK_SYNCBUSY_GENCTRL_GCLK2)
    {
        /* wait for the Generator 2 synchronization */
    }
}